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Nanomaterials 2018, 8(2), 60; https://doi.org/10.3390/nano8020060

Preparation and Characterization of Antimicrobial Films Based on LDPE/Ag Nanoparticles with Potential Uses in Food and Health Industries

1
Department of Materials Science and Engineering, Instituto de Química y Materiales Álvaro Alonso Barba (IQMAA), Universidad Carlos III de Madrid, Leganés 28911, Madrid, Spain
2
Department of Bioengineering and Aerospace Engineering, TERMeG, Universidad Carlos III de Madrid, Leganés 28911, Madrid, Spain
3
Department of Chemistry, Facultad de Ciencias, Universidad de Navarra, Pamplona 31080, Spain
*
Authors to whom correspondence should be addressed.
Received: 24 December 2017 / Revised: 16 January 2018 / Accepted: 16 January 2018 / Published: 24 January 2018
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Abstract

In this work, the antimicrobial effect of silver nanoparticles in polyethylene based nanocomposites has been investigated using a non-conventional processing method to produce homogeneous materials. High energy ball milling under cryogenic conditions was used to achieve a powder of well-blended low-density polyethylene and commercial silver nanoparticles. The final composites in the form of films were obtained by hot pressing. The effect of various silver nanoparticles content (0, 0.5, 1 and 2 wt %) on the properties of low-density polyethylene and the antimicrobial effectiveness of the composite against DH5α Escherichia coli were studied. The presence of silver nanoparticles did not seem to affect the surface energy and thermal properties of the materials. Apart from the inhibition of bacterial growth, slight changes in the aspect ratio of the bacteria with the content of particles were observed, suggesting a direct relationship between the presence of silver nanoparticles and the proliferation of DH5α E. coli (Escherichia coli) cells. Results indicate that these materials may be used to commercially produce antimicrobial polymers with potential applications in the food and health industries. View Full-Text
Keywords: polyethylene; silver nanoparticles; antimicrobial materials; high energy ball milling polyethylene; silver nanoparticles; antimicrobial materials; high energy ball milling
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Olmos, D.; Pontes-Quero, G.M.; Corral, A.; González-Gaitano, G.; González-Benito, J. Preparation and Characterization of Antimicrobial Films Based on LDPE/Ag Nanoparticles with Potential Uses in Food and Health Industries. Nanomaterials 2018, 8, 60.

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